Heat dissipating device

ABSTRACT

A heat dissipating device includes: a plurality of conduits stacked one above the other, each of the conduits including upper and lower halves, each including a base wall with two opposite end portions and an intermediate portion, a flange that extends from the base wall and that cooperates with the base wall to define a chamber half therebetween, and two protrusions that protrude respectively and outwardly of the chamber half from the end portions of the base wall, the protrusions being formed with a through-hole and being connected respectively to the protrusions of adjacent upper and lower halves of adjacent conduits; and a plurality of heat dissipating fin units, each is disposed between and is in contact with two adjacent ones of the conduits.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a heat dissipating device, more particularly to a heat dissipating device for a central processing unit (CPU).

2. Description of the Related Art

Central processing units (CPUs) of computers can generate a lot of heat during operation, which is required to be removed therefrom using a heat dissipating device so as to ensure stable operation of the computers.

Conventional water-cooling heat dissipating devices normally include tubes for passage of circulating water therethrough. The tubes are arranged to form a tortuous channel, and are supported on two opposite base plates. Since the heat dissipating device is relatively small, welding of the tubes on the base plates is relatively inconvenient.

SUMMARY OF THE INVENTION

Therefore, the object of this invention is to provide a heat dissipating device that is capable of overcoming the aforesaid drawback associated with the prior art.

Accordingly, a heat dissipating device of this invention includes: a plurality of conduits stacked one above the other, each of the conduits being in fluid communication with an adjacent one of the conduits and including upper and lower halves, each of the upper and lower halves including a flat base wall that has a peripheral edge, two opposite end portions, and an intermediate portion extending between the end portions, each of the upper and lower halves further including a flange that extends from the peripheral edge of the base wall and that cooperates with the base wall to define a chamber half therebetween, and two protrusions that protrude respectively and outwardly of the chamber half from the end portions of the base wall, at least one of the protrusions of each of the upper and lower halves of each of the conduits being formed with a through-hole, the protrusions of each of the upper and lower halves of each of the conduits being connected respectively to the protrusions of an adjacent one of the upper and lower halves of an adjacent one of the conduits in such a manner so as to permit fluid communication between two adjacent ones of the conduits; and a plurality of heat dissipating fin units, each of which is disposed between two adjacent ones of the conduits, and each of which is in contact with two adjacent ones of the intermediate portions of the base walls of the upper and lower halves of two adjacent ones of the conduits.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:

FIG. 1 is a schematic partly sectional view of the preferred embodiment of a heat dissipating device according to the present invention;

FIG. 2 is a schematic side view of the preferred embodiment;

FIG. 3 is a schematic top view of the preferred embodiment;

FIG. 4 is a perspective view to illustrate the structure of a half of one of the conduits of the preferred embodiment; and

FIG. 5 is a fragmentary sectional view of one of the conduits of the preferred embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1 to 5, the preferred embodiment of a heat dissipating device according to the present invention is shown to include: a plurality of conduits 2 stacked one above the other, each of the conduits 2 being in fluid communication with an adjacent one of the conduits 2 and including upper and lower halves 20, each of the upper and lower halves 20 including a flat base wall 201 that has a peripheral edge, two opposite end portions 23, 24, and an intermediate portion 25 extending between the end portions 23, 24, a flange 200 that extends from the peripheral edge of the base wall 201 and that cooperates with the base wall 201 to define a chamber half 207 therebetween, and two protrusions 202 that protrude respectively and outwardly of the chamber half 207 from the end portions 23, 24 of the base wall 201, at least one of the protrusions 202 of each of the upper and lower halves 20 of each of the conduits 2 being formed with a through-hole 203, the protrusions 202 of each of the upper and lower halves 20 of each of the conduits 2 being connected respectively to the protrusions 202 of an adjacent one of the upper and lower halves 20 of an adjacent one of the conduits 2 in such a manner so as to permit fluid communication between two adjacent ones of the conduits 2; and a plurality of heat dissipating fin units 5, each of which is disposed between two adjacent ones of the conduits 2, and each of which is in contact with two adjacent ones of the intermediate portions 25 of the base walls 201 of the upper and lower halves 20 of two adjacent ones of the conduits 2.

In this embodiment, each of the upper and lower halves 20 of each of the conduits 2 is made from a punched metal plate. It is noted that each of the topmost and the bottommost conduits 2 includes only one of the upper and lower halves 20.

After the conduits 2 are stacked one above the other, and are welded to each other, the chamber halves 207 of the upper and lower halves 20 of each of the conduits 2 cooperatively define a fluid chamber 208 in the respective one of the conduits 2. The conduits 2 are arranged in such a manner that the fluid chambers 208 are formed into a tortuous fluid channel (the flow directions in the conduits 2 are indicated by the arrows shown in FIG. 2).

Referring back to FIG. 2, the flanges 200 of the upper and lower halves 20 of each of the conduits 2 are welded to form a first seam 205 therebetween. Each of the protrusions 202 of each of the upper and lower halves 20 of each of the conduits 2 is welded to the respective one of the protrusions 202 of the adjacent one of the upper and lower halves 20 of the adjacent one of the conduits 2 to form a second seam 206 therebetween.

The heat dissipating device is further formed with a coolant inlet 26 (see FIG. 1) and a coolant outlet 27, that are in fluid communication with adjacent ones of the conduits 2, and that are connected to inlet and outlet tubes 4 for connection to a coolant circulating device (not shown).

Since the first seam 205 is formed around peripheral edges of the flanges 200 of the upper and lower halves 20 of each of the conduits 2 and since the second seam 206 is formed around peripheral edges of each welded pair of the protrusions 202, the welding operation for forming the first and second seams 205, 206 is more convenient to conduct as compared to the welding of the tubes on the base plates of the aforesaid conventional heat dissipating devices.

With the invention thus explained, it is apparent that various modifications and variations can be made without departing from the spirit of the present invention. 

1. A heat dissipating device characterized by: a plurality of conduits stacked one above the other, each of said conduits being in fluid communication with an adjacent one of said conduits and including upper and lower halves, each of said upper and lower halves including a flat base wall that has a peripheral edge, two opposite end portions, and an intermediate portion extending between said end portions, each of said upper and lower halves further including a flange that extends from said peripheral edge of said base wall and that cooperates with said base wall to define a chamber half therebetween, and two protrusions that protrude respectively and outwardly of said chamber half from said end portions of said base wall, at least one of said protrusions of each of said upper and lower halves of each of said conduits being formed with a through-hole, said protrusions of each of said upper and lower halves of each of said conduits being connected respectively to said protrusions of an adjacent one of said upper and lower halves of an adjacent one of said conduits in such a manner so as to permit fluid communication between two adjacent ones of said conduits; and a plurality of heat dissipating fin units, each of which is disposed between two adjacent ones of said conduits, and each of which is in contact with two adjacent ones of said intermediate portions of said base walls of said upper and lower halves of two adjacent ones of said conduits.
 2. The heat dissipating device of claim 1, characterized in that said flanges of said upper and lower halves of each of said conduits are welded to form a first seam therebetween.
 3. The heat dissipating device of claim 2, further characterized in that each of said protrusions of each of said upper and lower halves of each of said conduits is welded to the respective one of said protrusions of the adjacent one of said upper and lower halves of the adjacent one of said conduits to form a second seam therebetween.
 4. The heat dissipating device of claim 3, further characterized in that said chamber halves of said upper and lower halves of each of said conduits cooperatively define a fluid chamber in the respective one of said conduits, said conduits being arranged in such a manner that said fluid chambers in said conduits are formed into a tortuous fluid channel. 